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Mar 15, 2010 | 08:32 PM

#21

AZ MSCL

Thread Starter

1st Gear Member

Joined: Oct 2009

Posts: 63

From: AZ

Quote:

Originally Posted by Gene K

C&L air Intake / Good Camshaft w/ Springs and Limiters / LT Headers & Full Exhaust will add about 50 rwhp over a "Tune Only" 2010.

On an automatic I suggest adding 4.10 or 4.30 (Better) gears and a good converter as supporting mods. Otherwise the car is going to be weaker off the bottom.

Adding gears lowers the gear ratio. What does it do to gas mileage? Any significant difference? I know, dumb question when talking about superchargers and other enhancements that are sure to reduce gas mileage. Thanks for responding Gene.

Mar 15, 2010 | 10:25 PM

#22

Gene K

5th Gear Member

Joined: Jun 2007

Posts: 2,176

From: Decatur AL USA

Quote:

Originally Posted by AZ MSCL

If will cost about 10-20% on the highway. May actually improve the city mileage by 5%.

The converter will not affect highway mileage (lock-up) but will hurt city mileage a little.

Overall I would expect about a 10-20% drop overall.

Headers should actually improve mileage.

As to any mpg losses from the cam and tune that would depend on exact cam specs and the quality of the tune.

Mar 15, 2010 | 11:22 PM

#23

sadface

2nd Gear Member

Joined: Nov 2009

Posts: 334

From: NY

Quote:

Originally Posted by AZ MSCL

I need some help. My wife wants more power for her 2010 GT. I know the basic options: 1) S/C or turbos, 2) cams/heads/other or wait for the 2011's. I got 1 and 3 figured out, but what about #2? Is there anything I can do for a couple grand and get a 100 HP in return? No nitrous. Thanks.

shes def a keeper